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9.   Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today.      A. ore B. hydrogen C. oxygen D. lead
Ancient cyanobacteria released oxygen , which assisted in creating the atmosphere as we know it today.
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Asked 1/13/2015 10:08:55 PM
Updated 1/14/2015 5:19:54 AM
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This answer has been confirmed as correct and helpful.
Edited by jeifunk [1/14/2015 5:19:40 AM], Confirmed by jeifunk [1/14/2015 5:19:54 AM]
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When new clay sediment is deposited on top of old beach material, it's known as Transgression.

Added 12/29/2017 10:21:28 AM
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